I saw the film version of this book starring Bryan Browne (FX) (sp?)
In the final duel between Brock and Struan during the typhoon; IIRC they are using (what the prop master at least thought) were fighting Irons .
They looked about the size (a bit longer) and shape of a crowbar with a hooked end and a smallish blade welded parallel to the shaft about 6 inches below the hooked end .
Could the image below (top left) be one ?
Anyone read Chinese ?
For what it's worth anyway ..